Mold system for composite molding

ABSTRACT

[PROBLEM]To provide a method of molding a composite molded article enabling compression molding without requiring a large sized injection molding machine and a mold system used for that. 
     [MEANS FOR SOLUTION]A method of molding a composite molded article using a first mold member  13  to mold a primary molded article  29  by primary molding, switching a movable mold member holding the primary molded article  29  with a movable mold member  14  positioned with a second mold member  15 , then using a second mold member  15  in which the primary molded article  29  is inserted to mold a secondary molded article  30  by secondary molding, wherein the primary molding and the secondary molding are executed by non-continuous different steps at points of time different from each other.

TECHNICAL FIELD

The present invention relates to a molding method using a mold systemcomprising a first mold member, second mold member, and movable memberto compression mold a composite molded article.

BACKGROUND ART

As art relating to a method and mold system for injection molding acomposite product made of resins of different properties, there are aninjection molding method of a composite product and a mold system forinjection molding a composite product (see for example Patent Document1). This Patent Document 1 uses a primary molding unit to mold a primarymolded part by primary molding, switches a movable mold holding theprimary molded part with a movable mold of a secondary molding unit, anduses a secondary molding unit having the primary molded part as aninsert to mold a secondary molded part by secondary molding and therebysimultaneously proceed with the primary molding and secondary molding.

According to the injection molding method and mold system of PatentDocument 1 described above, molds are juxtaposed to a fixed platen andmovable platen. Therefore, a large sized fixed platen and movable platenbecome necessary and the shape of the injection molding machine alsobecomes larger, so this is not suitable for molding a large sized moldedarticle. Further, in order to mold a vehicular use transparent member orother large sized and thin sheet shaped molded article without deviationin sheet thickness and with a high precision, it must be performed bycompression molding. According to the technology of Patent Document 1explained above, however, the clamping operations of the primary moldingand secondary molding can only be performed simultaneously and inaddition under the same conditions. Therefore, it is substantiallyimpossible to individually perform the compression molding operations byindividual mold systems. In particular, the molding method of PatentDocument 1 cannot be applied to composite molding of a vehicular usetransparent member etc. where compression molding is essential formolding the thin sheet window by the primary molding, but compressionmolding is not needed for molding the frame at the outer circumferenceof the window by the secondary molding.

Further, there is a system for producing an injection molded articlecomprising at least two plastic melts (see for example Patent Document2). This Patent Document 2 is a type having a fixed mold mounting platestationarily attached to a machine frame, a mold mounting plate able tomove along at least four horizontal tie rods arranged between the fixedmold mounting plate and a counter pressure plate stationarily attachedto the machine frame and extending substantially horizontally, and,between them, an additional mold mounting device movable with respect tothe mold mounting plate and rotatable around an axis of rotation alignedperpendicular to the longitudinal axis of the horizontal tie rods. Themold mounting device holds mold halves cooperating with mold halves ofthe mold mounting plates on at least two side surfaces aligned with aspacing from each other and parallel to the axis of rotation. Each ofthe mold mounting plates is provided with at least one opening.Plasticizing and injection units are connected via these openings to oneor more sprue channels in the mold halves held by the mold mountingplates. The two mold halves are simultaneously or directly successivelysupplied with one or more plastic melts from the injection unitsconnected to the mold halves. Accordingly, according to Patent Document2 explained above, the mold halves are arranged on the same axis.Therefore, the problem of the larger size of the injection moldingmachine in Patent Document 1 explained above is solved, but the problemof compression molding being impossible is not solved.

[Patent Document 1] Japanese Patent Publication (A) No. 2002-225078

[Patent Document 2] Japanese Patent Publication (A) No. 11-105072

DISCLOSURE OF THE INVENTION Problem to be Solved by the Invention

The present invention was made in order to solve the above problem andhas as an object thereof to provide a method of molding a compositemolded article enabling compression molding without requiring a largesized injection molding machine and a mold system used for the same.

Means for Solving the Problem

Namely, the aspect of the invention relates to a method of molding acomposite molded article using a first mold member to mold a primarymolded article by primary molding, switching a movable mold memberholding the primary molded article with a movable mold member positionedwith a second mold member, then using a second mold member in which theprimary molded article is inserted to mold a secondary molded article bysecondary molding, wherein the primary molding and the secondary moldingare executed by non-continuous different steps at points of timedifferent from each other.

The aspect of the invention relates to a method of molding a compositemolded article which performs either of the primary molding and thesecondary molding by compression molding reducing a volume of a cavity.

The aspect of the invention relates to a method of molding a compositemolded article which, when performing the compression molding, controlsa plurality of clamping devices to control compression to hold themovable mold member and first mold member or second mold memberparallel.

The aspect of the invention also relates to a mold system for compositemolding comprising a first mold member, second mold member, and movablemold member, wherein the movable mold member is positioned to enablingswitching between the first mold member and the second mold member andis provided freely engagable/disengagable with the first mold member andthe second mold member by a clamper.

The aspect of the invention also relates to a mold system for compositemolding wherein the clamper connects and engages the movable mold memberand one of the first mold member and the second mold member and engagesthe other with a gap.

Effects of the Invention

The aspect of the invention is a method of molding a composite moldedarticle using a first mold member to mold a primary molded article byprimary molding, switching a movable mold member holding the primarymolded article with a movable mold member positioned with a second moldmember, then using a second mold member in which the primary moldedarticle is inserted to mold a secondary molded article by secondarymolding, wherein the primary molding and the secondary molding areexecuted by non-continuous different steps at points of time differentfrom each other, so the compression molding in the composite molding canbe effectively executed.

According to the aspect of the invention, the method performs either ofthe primary molding and the secondary molding by compression moldingreducing a volume of a cavity, so can mold a low distortion compositemolded article.

According to the aspect of the invention, when performing thecompression molding, the method controls a plurality of clamping devicesto control compression to hold the movable mold member and first moldmember or second mold member parallel, so can mold a composite moldedarticle having a uniform sheet thickness and having a high precision.

The aspect of the invention is also a mold system for composite moldingcomprising a first mold member, second mold member, and movable moldmember, wherein the movable mold member is positioned to enablingswitching between the first mold member and the second mold member andis provided freely engagable/disengagable with the first mold member andthe second mold member by a clamper, so can effectively perform thecompression molding in the composite molding without requiring a largesized injection molding machine.

According to the aspect of the invention, the clamper connects andengages the movable mold member and one of the first mold member and thesecond mold member and engages the other with a gap, so the compressionmolding can be effectively executed in either of the first mold memberand the second mold member.

BEST MODE FOR CARRYING OUT THE INVENTION

An embodiment of the present invention will be explained in detail basedon the drawings. FIG. 1 is a vertical sectional view of a clampingdevice showing a state where a movable mold rotates after primarymolding and then starts secondary molding, FIG. 2 is a verticalsectional view of a clamping device showing a state of closing the moldfor secondary molding, FIG. 3 is a vertical sectional view of a clampingdevice showing a state where the mold closing is completed and moldclamping is prepared for, FIG. 4 is a vertical sectional view of aclamping device showing a state where the mold is clamped and thesecondary molding is carried out, FIG. 5 is a vertical sectional view ofa clamping device showing a state where the mold is opened for theprimary molding and the compression molding is prepared for, FIG. 6 is avertical sectional view of a clamping device showing a state where theinjection of the primary molding is carried out, FIG. 7 is a verticalsectional view of a clamping device showing a state where thecompression molding of the primary molding is carried out, FIG. 8 is avertical sectional view of a clamping device showing a state where moldrelease of the primary molding is carried out, FIG. 9 is a verticalsectional view of a clamping device showing a state where mold releaseof the secondary molding is carried out, FIG. 10 is a vertical sectionalview of a clamping device showing a state where mold opening is carriedout, FIG. 11 is a vertical sectional view of a clamping device showing astate where a secondary molded article is taken out, FIG. 12 is avertical sectional view of a clamping device showing a state after theprimary molding and secondary molding end and before the movable moldmember rotates, FIG. 13 is a side view of a mold system showing aclamped state, and FIG. 14 is a horizontal sectional view showinganother embodiment of composite molding attaching another mold system toanother clamping device.

A clamping device 10 configures an injection molding machine togetherwith a first injection device 11 and second injection device 12. Theclamping device 10 is configured by a fixed platen 21 attaching a firstmold member 13, a movable platen 22 attaching a second mold member 15and facing the fixed platen 21, a movable mold member 14 which canrotates and move in a mold opening/closing direction between the firstmold member 13 and second mold member 15 by a rotating/moving device 17,clamping devices 19 provided in the vicinity of four corners of themovable platen 22 and comprising hydraulic cylinder devices or the like,tie bars 23 formed by extension of rods of hydraulic cylinder devices ofthe clamping devices 19, engagement devices 20 provided at openings ofthrough holes provided at four corners of the fixed platen 21 on theextension of the tie bars 23 and passing through ends of the tie bars 23at the fixed platen 21 sides with play, and mold opening/closing devices18 comprising hydraulic cylinder devices or the like provided as a pairon upper and lower surfaces or front and back surfaces of the fixedplaten 21 and making the movable platen 22 approach and/or move awayfrom to the fixed platen 21.

The first mold member 13, movable mold member 14, and second mold member15 are used to configure a mold system 16. As shown in FIG. 13, the moldsystem 16 has first clampers 25 and second clampers 26. The firstclampers 25 are configured by attachment seats 44 fixed to thepositioning surface of the first mold member 13 with the movable moldmember 14 while bulging out from the first mold member 13 to the movablemold member 14 side, wedges 41 which can freely slide in square throughholes of the attachment seats 44, grooves 40 provided in upper and lowerend faces of the movable mold member 14 so as to engage with the wedges41, connection rods 43 fixed to ends opposite to ends of the wedges 41engaged with the grooves 40, and two hydraulic cylinder devices 42provided between the two ends of the connection rods 43 and theattachment seats 44. The first clampers 25 are designed so that gaps Gare formed at positioning surfaces of the first mold member 13 andmovable mold member 14 when operating the hydraulic cylinder devices 42to make the wedges 41 engage with the grooves 40. Further, the secondclampers 26 are configured by attachment seats 45 fixed to thepositioning surface of the second mold member 15 with the movable moldmember 14 while bulging from the second mold member 15 to the movablemold member 14 side, wedges 41 which can freely slide in angular throughholes of the attachment seats 45, grooves 40 provided in upper and lowerend faces of the movable mold member 14 so as to engage with the wedges41, connection rods 43 fixed to ends opposite to ends of the wedges 41engaged with the grooves 40, and two hydraulic cylinder devices 42provided between the two ends of the connection rods 43 and theattachment seats 44. The second clampers 26 are designed so thatpositioning surfaces of the second mold member 15 and movable moldmember 14 contact when operating the hydraulic cylinder devices 42 tomake the wedges 41 engage with the grooves 40. Note that, in the moldsystem 16, the first clampers 25 and second clampers 26 were set asdescribed above in order to make the first mold member 13 performcompression molding, but it is also possible to make the second moldmember 15 perform the compression molding. In that case, the positionsof the first clampers and second clampers become opposite to thosedescribed above.

Here, a composite molded article molded by the mold system 16 will beexplained. As composite molded articles, for example, plastic windowglasses of buildings, vehicles (automobiles, railroads, etc.), and/orships and aircraft or other transport machinery, head lamp lens andmeter covers and other vehicle use transparent members, illuminationlamp covers, solar battery covers or solar battery substrates, liquidcrystal/plasma/organic EL and other display panel members (diffusionplates, diffusion films, lens films, cover films, light guide plates,prism lenses, Fresnel lenses, etc.), amusement machine (pachinko machineetc.) parts, etc. can be mentioned. As vehicle use transparent members,plastic windshield (front windows, rear windows, backdoor windows,front/rear side windows, front/rear quarter windows, etc.), head lamplenses, rear lamp lenses, front bumpers/front grilles, garnishes,plastic bodies (fenders, doors, tail gates, etc.), sun roofs, panoramicroofs, detachable tops, window reflectors, blinker lamp lenses, andother exterior members, meter covers, room lamp lenses, display usefront panels, and other interior members, and so on may be mentioned.Here, the vehicle use transparent members form modules of thin sheetshaped windows made of for example transparent thermoplastic resins, forexample, transparent polycarbonate resins, and attachment portions ofthe windows to the vehicles, design parts/shield parts/illuminationparts, mechanical members, illumination members, or the like, so includeframes molded joined with the windows and made of colored thermoplasticresins, for example, colored polycarbonate resins, alloy-based resins ofpolycarbonate resins and other resins (polyester resins etc.),thermoplastic elastomers, etc. Parts other than vehicle use transparentmembers form modules of thin sheet shaped surface layer portions made ofthermoplastic resins such as polycarbonate resins with attachmentportions with the surface layer portions, design parts/shieldparts/illumination parts, mechanical members, illumination members, orthe like, so include back layer portions molded joined with the aboveportions and made of thermoplastic resins such as optically transparentpolycarbonate resins, light diffusing polycarbonate resins, alloy-basedresins of the polycarbonate resins with other resins (polyester resins,ABS resins, etc.), and thermoplastic elastomers. In this way, manycomposite molded articles are configured by combinations of parts havingdifferent properties. Irrespective of this, they are sometimesconfigured by parts having the same properties as well for increasingthe volume and area of the molded articles. Molded articles of a thinsheet shape disliking distortion as represented by for example windowsof vehicle use transparent members are preferably molded by compressionmolding.

Next, based on FIG. 1 to FIG. 12, a detailed explanation will be givenof the method of molding a secondary molded article 30 of the compositemolded article in the sequence of steps while mixing in an explanationof the operation of the clamping device 10. Note that the first clampers25 and second clampers 26 described in FIG. 1 to FIG. 12 are shown inshapes different from those explained in FIG. 13. The shapes of thefirst clampers 25 and second clampers 26 described in FIG. 1 to FIG. 12are symbolically expressed for an easy understanding of the functions.Further, when the clampers are in engaged states, these are displayedwith their insides shown black. FIG. 1 shows a state before the primarymolded article 29 molded by the first mold member 13 in a previousmolding cycle is inserted inside the second mold member 15 along withthe rotation of the movable mold member 14 and shows a point of time ofstart of the molding cycle. In this step, all actuators are neutral anddo not operate.

FIG. 2 shows a step during the mold closing of the clamping device 10.The movable mold member 14 approaches the first mold member 13 by therotating/moving device 17 whereby a core portion of the movable moldmember 14 on the side where the primary molded article 29 is not held ispositioned with the first mold member 13 and a first cavity 35 isformed. Further, simultaneously with that, hydraulic oil is supplied toa mold closing chamber 31 of the mold opening/closing device 18 andmakes the movable platen 22 approach the fixed platen 21. In order tofacilitate the understanding of this situation, as shown in FIG. 2, themold closing chamber 31 is displayed hatched. After this, the operationof the other hydraulic cylinder device will be expressed in the sameway.

In FIG. 3, the mold opening/closing device 18 is used to move themovable platen 22, the second mold member 15 is positioned with the coreportion of the movable mold member 14 on the side where the primarymolded article 29 is held, the primary molded article 29 is insertedinto the second mold member 15 and, at the same time, a space in thesecond mold member 15 other than the region occupied by the insertion ofthe primary molded article 29 is formed as a second cavity 36. At thistime, the hydraulic cylinder devices 42 of the second clampers 26 of themold system 16 are operated, the wedge 41 is engaged with the groove 40,and the movable mold member 14 and second mold member 15 are contactedand fixed. Further, at this time, the four tie bars 23 pass through thethrough holes of the fixed platen 21, and the engagement grooves 24provided at the front ends of the tie bars 23 are engaged withprojection pins of the engagement device 20.

In FIG. 4, hydraulic oil is supplied to clamping chambers 33 of the fourclamping devices 19 to clamp the mold system 16. Then, the secondinjection device 12 is advanced and its nozzle made to abut against asecond sprue bushing 28 communicated with the second cavity 36 of thesecond mold member 15, then the molten material is injected and filledinto the second cavity 36 from the second injection device 12. This stepis the secondary molding.

FIG. 5 shows a step of suspending the supply of the hydraulic oil to themold closing chamber 31 of the mold opening/closing device 18 andsupplying the hydraulic oil to the opening chamber 34 of the clampingdevice 19 to move the movable platen 22 away from the fixed platen 21.Due to this, the movable mold member 14 is fixed to the second moldmember 15 by the second clampers 26, therefore the movable mold member14 is moved away from the first mold member 13 by a predetermineddistance and the first cavity 35 is increased in volume. At this time,the movement of the movable mold member 14 is preferably performedparallel to positioning surfaces of the movable mold member 14 and firstmold member 13 for executing the compression molding of the thin sheetshaped molded article well. The means for realizing such parallelcontrol is not shown, but is as follows. Namely, a servo valve isconnected to the clamping chamber 33 and opening chamber 34 of eachclamping device 19, a sensor for measuring the distance between thefixed platen 21 and the movable platen 22 is provided in the vicinity ofeach clamping device 19, and each servo valve is feedback controlled sothat measured value of the sensor coincides with a predetermined value.

In FIG. 6, the first injection device 11 is advanced, the nozzle thereofis made to abut against the first sprue bushing 27 communicated with thefirst cavity 35 of the first mold member 13, then the molten material isinjected into the first cavity 35 increased in volume by a predeterminedamount by the above parallel control, positioned, and held from thefirst injection device 11. This step is the primary molding. The primarymolding is executed at a point of time different from that of thesecondary molding explained above and the secondary molding is executedin a different step not continuing after the primary molding.

In FIG. 7, compression molding is carried out as a continuous step tothe primary molding. The compression molding is carried out bycompressing the molten material injected into the first cavity 35enlarged in FIG. 6 by using four clamping devices 19 to reduce thevolume of the first cavity 35 and spreading the molten material in thefirst cavity 35 to fill the first cavity 35. Then, the primary moldedarticle 29 is shaped. At this time, the movable mold member 14 is fixedto the second mold member 15 to become integral by the second clampers26, therefore the parallel control explained above by four clampingdevices 19 acts directly and effectively with respect to the first moldmember 13. As a result, the molten material flows in the first cavity 35at a high speed and uniformly, therefore the first molded article 29 hasa low distortion as the effect of the compression molding and, at thesame time, the sheet thickness becomes uniform and high in precision aseffects of the parallel control.

In FIG. 8, a mold releasing step of the first molded article 29 from thefirst mold member 13 is carried out by the same operation as that inFIG. 5.

In FIG. 9, the first clampers 25 are operated so that the first moldmember 13 and movable mold member 14 are engaged with a gap Gtherebetween and, at the same time, the engagement of the second clamper26 is released. Then, by supplying the hydraulic oil to the openingchamber 34 of the clamping device 19, a larger mold opening force thanthat by the mold opening/closing device 18 is generated to release thesecondary molded article 30 from the movable mold member 14.

In FIG. 10, the engagement of the first clampers 25 is released and, atthe same time, the projected projection pins of the engagement devices20 are retracted to release the engagement of the tie bars 23 and thefixed platen 21. Then, the supply of the hydraulic oil to the openingchamber 34 is stopped and, at the same time, the supply of the hydraulicoil to the mold opening chamber 32 of the mold opening/closing device 18is started. Due to this, the movable platen 22 opens the mold up to thepredetermined position. Further, simultaneously, the movable mold member14 is moved away from the first mold member 13 by the rotating/movingdevice 17.

In FIG. 11, after the mold opening step of the movable platen 22 endsand the movable platen 22 is stopped at the predetermined position, thesecondary molded article 30 is pushed from the second mold member 15 bya not shown injector device provided in the movable platen 22, and atakeout step of the secondary molded article 30 is carried out.

FIG. 12 shows a state before the primary molding and secondary moldingend and the movable mold member 14 rotates and shows a state where onemolding cycle ends. After this, the movable mold member 14 rotates by180 degrees and the point of start of a molding cycle, that is, FIG. 1,is reached.

Next, another embodiment of composite molding by another mold system andanother clamping device 60 will be explained based on FIG. 14. A moldsystem constituted by a movable mold member 52, first mold member 53,and second mold member 54 is attached to a fixed platen 50 and movableplaten 51, and the first mold member 53 and second mold member 54 arejuxtaposed to each other. The movable mold member 52 is configured sothat it can rotate by a rotation drive portion 55 in order to insert theprimary molded article molded in the first cavity 58 into the secondmold member 54 when it is not positioned with the first mold member 53and second mold member 54. A first injection device 56 abuts against thefirst cavity 58, and a second injection device 57 abuts against a secondcavity 59 by communicating channels of molten materials. Then, in thesame way as the embodiment explained according to FIG. 1 to FIG. 12,after the primary molded article molded in the first cavity 58 in theprimary molding is inserted into the second mold member 54, thesecondary molded article is molded in the second cavity 59 in thesecondary molding. At this time, in the secondary molding, compressionmolding is not carried out, the movable mold member 52 and second moldmember 54 are sufficiently positioned and schematically contacted, andthe molded article is molded. On the other hand, in the primary molding,the molten material is injected from the first injection device 56 byincreasing the volume of the first cavity 58 while holding the secondarymolded article in the second cavity 59, and the compression molding isexecuted by reducing the volume of the first cavity 58 after that. Atthis time, the compression force generated between the fixed platen 50and movable platen 51 is largely biased to the first mold member 53side, but the compression molding can be effectively carried out withoutproblem by executing the parallel control explained above. The clampingdevice 60 of FIG. 14 has the advantage that it is not necessary toprovide clampers in the mold system although there is the problem thatthe shape of the injection molding machine is large sized since thefirst mold member 53 and second mold member 54 are juxtaposed to thefixed platen 50 and movable platen 51.

Note that the present invention includes all possible embodiments towhich modifications, corrections, improvements, etc. are made based onthe knowledge of persons skilled in the art. Further, the aboveembodiments to which the modifications etc. are added are includedwithin the scope of the present invention insofar as they do not departfrom the gist of the present invention. For example, the movable moldmember was illustrated as a rotating one, but the movable mold membermay be configured so that it slides upward/downward orleftward/rightward and is switched with the first mold member or secondmold member. In particular, this can be easily realized in a clampingdevice arranging the first mold member and second mold member juxtaposedto the fixed platen and movable platen. Further, the explanation wasgiven as if the first mold member were used for the primary molding andthe second mold member were used for the secondary molding, but clearlythe second mold member may be used for the primary molding and the firstmold member may be used for the secondary molding. Further, anembodiment performing the primary molding by compression molding andperforming the secondary molding by not compression molding butinjection molding was explained, but performing the primary molding bynot compression molding but injection molding and performing thesecondary molding by compression molding is also possible. Naturally,the compression can be carried out in the primary molding and thecompression molding can be carried out in the secondary molding by usingthe in-die compression device or the like or the compression molding canbe carried out in the primary molding by using the in-die compressiondevice or the like and the secondary molding can be carried out bycompression molding.

BRIEF DESCRIPTION OF THE DRAWINGS

[FIG. 1] A vertical sectional view of a clamping device showing a statewhere a movable mold rotates after primary molding and then startssecondary molding.

[FIG. 2] A vertical sectional view of a clamping device showing a stateof closing the mold for secondary molding.

[FIG. 3] A vertical sectional view of a clamping device showing a statewhere the mold closing is completed and mold clamping is prepared for.

[FIG. 4] A vertical sectional view of a clamping device showing a statewhere the mold is clamped and the secondary molding is carried out.

[FIG. 5] A vertical sectional view of a clamping device showing a statewhere the mold is opened for the primary molding and the compressionmolding is prepared for.

[FIG. 6] A vertical sectional view of a clamping device showing a statewhere the injection of the primary molding is carried out.

[FIG. 7] A vertical sectional view of a clamping device showing a statewhere the compression molding of the primary molding is carried out.

[FIG. 8] A vertical sectional view of a clamping device showing a statewhere mold release of the primary molding is carried out.

[FIG. 9] A vertical sectional view of a clamping device showing a statewhere mold release of the secondary molding is carried out.

[FIG. 10] A vertical sectional view of a clamping device showing a statewhere mold opening is carried out.

[FIG. 11] A vertical sectional view of a clamping device showing a statewhere a secondary molded article is taken out.

[FIG. 12] A vertical sectional view of a clamping device showing a stateafter the primary molding and secondary molding end and before themovable mold member rotates.

[FIG. 13] A side view of a mold system showing a clamped state.

[FIG. 14] A horizontal sectional view showing another embodiment ofcomposite molding attaching another mold system to another clampingdevice.

DESCRIPTION OF NOTATIONS

10 clamping device

11 first injection device

12 second injection device

13 first mold member

14 movable mold member

15 second mold member

16 mold

18 mold opening/closing device

19 clamping device

21 fixed platen

22 movable platen

25 first clamper

26 second clamper

29 primary molded article

30 secondary molded article

35 first cavity

36 second cavity

G gap

The invention claimed is:
 1. A mold system for composite moldingcomprising: a first mold member attached to a fixed platen for a primarymolding, a second mold member attached to a movable platen for asecondary molding, and a movable mold member which can rotate and movein a mold opening/closing direction between the first mold member andthe second mold member, said mold system characterized in that: themovable mold member is positioned to enable switching between the firstmold member and the second mold member; the movable mold member isprovided freely engagable/disengagable with the first mold member andthe second mold member by clampers; the movable mold member approachesto the first mold member to form a first cavity, the movable platen towhich the second mold member is attached approaches to the movable moldmember to form a second cavity upon which the mold closing is completed;either of the primary molding and the secondary molding can be performedby either of the first mold member or the second mold member; theprimary molding and the secondary molding are executed by non-continuousdifferent steps at points of time different from each other; and eitherof the primary molding and the secondary molding is performed bycompression molding reducing a volume of the first or second cavity;with the mold member for the compression molding opening to increase avolume of the cavity for the compression molding before the compressionmolding step; and the primary molding is performed after the secondarymolding in which the primary molded article is inserted to mold asecondary molded article.
 2. The mold system for composite molding asset forth in claim 1, wherein the clamper connects and engages themovable mold member and one of the first mold member and the second moldmember and engages the other with a gap.
 3. A mold system for compositemolding comprising: a first mold member attached to a fixed platen for aprimary molding, a second mold member attached to a movable platen for asecondary molding, and a movable mold member which can rotate and movein a mold opening/closing direction between the first mold member andthe second mold member, said mold system characterized in that: themovable mold member enables switching a position facing to the firstmold member and the second mold member; the movable mold member isfreely combined with the first mold member or the second mold member bya clamper; the movable mold member approaches to the first mold memberto form a first cavity, the movable platen to which the second moldmember is attached approaches to the movable mold member to form asecond cavity upon which the mold closing is completed; the primarymolding and the secondary molding can be performed by either the firstmold member or the second mold member; the primary molding and thesecondary molding are not operated at the same time executed bydiscontinuous different timing step from each other; and either of theprimary molding and the secondary molding is performed by compressionmolding reducing a volume of the first or second cavity; with the moldmember for the compression molding opening to increase a volume of thecavity for the compression molding before the compression molding step;and the movable member and the second mold member are combined togetherto perform the compression molding.
 4. The mold system for compositemolding as set forth in claim 3, wherein the clamper connects andengages the movable mold member and one of the first mold member and thesecond mold member and engages the other with a gap.